The code you've provided would throw an error. It cannot read the mat file. So, I've modified your code as follows to make it work:
C = load("Error.mat");
det(cov(C.C))
Kindly try this code out.
However, when I'm trying to computing the covariance of the matrix in ‘Error.mat’ file, I'm getting '2.9297e+05' as the answer (which is 292970). I'm not getting a negative value.
Hope this helps.
Thanks!
